Hongyi's son is Jia Baoyu.
Heng is Xue Baochai.
The old farmer Daoxiang is Li Wan.
These names are called numbers, which were invented by ancient literati for convenience, and are similar to the current pen names. In A Dream of Red Mansions, they are numbered to stop being called "Gu" and "Sister-in-law", so they are numbered according to their characteristics.